President Obama and daughters Malia (left) and Sasha return to the White House in Washington on Nov. 7, 2012, for the first time since his victory on Election Day. (Associated Press)
** FILE ** President Obama and his family arrive Nov. 7, 2012, in their vehicle to the North Portico of the White House in Washington for the first time after his re-election. (Associated Press/The New York Times)
President Obama waves Nov. 7, 2012, as he exits Air Force One in Washington with first lady Michelle Obama and daughters Malia and Sasha on return to the White House after spending Election Night in Chicago. (Associated Press)
President Barack Obama supporters celebrate with champagne outside of the White House in Washington following his re-election early Wednesday, Nov. 7, 2012. (AP Photo/Jose Luis Magana)
Kelly Rodgers, 18, of Philadelphia, holds a sign saying "We Will Barack You" as people celebrate outside of the White House after President Barack Obama won re-election against Mitt Romney in the presidential election on Pennsylvania Avenue in Washington, Wednesday, Nov. 7, 2012. (AP Photo/Jacquelyn Martin)
People celebrate outside of White House on Pennsylvania Avenue after President Barack Obama won re-election against Mitt Romney in the presidential election in Washington, Wednesday, Nov. 7, 2012. (AP Photo/Jacquelyn Martin)
**FILE** President Obama stands with Bob Dylan before awarding him the Medal of Freedom during a May 29, 2012, ceremony in the East Room of the White House. (Associated Press)
** FILE ** In this April 5, 2011, file photo Israeli President Shimon Peres speaks to members of the media outside White House in Washington following his meeting with President Barack Obama. (AP Photo/Pablo Martinez Monsivais, File)
David Axelrod (left), senior adviser for the Obama campaign, and David Plouffe, White House senior adviser, talk during a campaign event for President Obama on Nov. 2, 2012, at Springfield High School in Springfield, Ohio. (Associated Press)
** FILE ** Then-Chinese Vice President Xi Jinping (left) meets on Feb. 14, 2012, with President Obama in the Oval Office of the White House in Washington. (Associated Press)
Fala, the pet Scottie of President Franklin Delano Roosevelt, obliges news photographers as he poses outside the White House on April 7, 1942 for his second birthday. (AP Photo/grs)
President Barack Obama pets the family dog Bo, a Portuguese water dog, outside the Oval Office of the White House in Washington, Thursday, March, 15, 2012. (AP Photo/Pablo Martinez Monsivais)